SOLUTION: Find the sum and product of roots. 3x^2-5x+7=0

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Question 415357: Find the sum and product of roots.
3x^2-5x+7=0
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

Find the sum and product of roots.

3x^2-5x+7=0    |Note: Determinant = 25-84 = -59 thus imaginary roots

x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+

x+=+%285+%2B-+isqrt%28+59%29%29%2F%286%29+

x+=+5%2F6+%2B-+isqrt%2859%29%2F%286%29

sum of the roots = 10/6 = 5/3

Product 25/36 + 59/36 = 84/36 = 7/3 

Note i^2 = -1